Investments (Borrowed Securities Repurchased Securities And Repurchased Reversed Repurchased Securities) (Details) - USD ($) $ in Millions		Dec. 31, 2024		Dec. 31, 2023
Securities Financing Transaction [Line Items]
Available for Sale at Fair value - Amortized cost		$ 82,907		$ 64,977
Fixed maturity securities available-for-sale at fair value (amortized cost of $82,907 and $64,977; allowance for credit losses of $98 and $75)		77,617	[1]	60,467	[2]
Deposits
Securities Financing Transaction [Line Items]
Available for Sale at Fair value - Amortized cost		10		12
Fixed maturity securities available-for-sale at fair value (amortized cost of $82,907 and $64,977; allowance for credit losses of $98 and $75)		8		9
Collateral Fixed Maturity Securities [Member]
Securities Financing Transaction [Line Items]
Available for Sale at Fair value - Amortized cost		1,200		572
Fixed maturity securities available-for-sale at fair value (amortized cost of $82,907 and $64,977; allowance for credit losses of $98 and $75)		1,046		517
Collateral Received Fixed Maturity Securities [Member]
Securities Financing Transaction [Line Items]
Fixed maturity securities available-for-sale at fair value (amortized cost of $82,907 and $64,977; allowance for credit losses of $98 and $75)		2,233		1,827
Carrying Value [Member]
Securities Financing Transaction [Line Items]
Assets Held-in-trust		47,162		32,758
Estimate of Fair Value Measurement [Member]
Securities Financing Transaction [Line Items]
Assets Held-in-trust		44,473		30,359
Federal Home Loan Bank Certificates and Obligations (FHLB)
Securities Financing Transaction [Line Items]
Available for Sale at Fair value - Amortized cost		71		63
Fixed maturity securities available-for-sale at fair value (amortized cost of $82,907 and $64,977; allowance for credit losses of $98 and $75)		71		63
Securities Financing Transaction, Fair Value
Securities Financing Transaction [Line Items]
Securities Borrowed	[3]	1,093		1,013
Securities Loaned	[4]	836		732
Cash Collateral for Borrowed Securities	[5]	0		0
Securities Sold under Agreements to Repurchase
Securities Financing Transaction [Line Items]
Securities Borrowed	[3]	688		517
Securities Loaned	[4]	1,781		1,333
Cash Collateral for Borrowed Securities	[5]	$ 982		$ 820

[1] Excludes limited partnerships that are measured at estimated fair value using the NAV per share (or its equivalent) as a practical expedient. As of December 31, 2024, the fair value of such investments was $966 million

[2] Excludes limited partnerships that are measured at estimated fair value using the NAV per share (or its equivalent) as a practical expedient. As of December 31, 2023, the fair value of such investments was $856 million.

[3] Securities borrowed or received as collateral through securities lending transactions or purchased from counterparties through reverse repurchase transactions are not reflected on the condensed consolidated balance sheets.

[4] Securities loaned or pledged through securities lending transactions or sold to counterparties through repurchase transactions are included within fixed maturity securities. Collateral associated with certain securities lending transactions is not included within this table as the collateral pledged to the counterparty is the right to reinsurance treaty cash flows. Certain securities lending transactions do not require collateral.

[5] A payable for the cash received by the Company is included within other liabilities.